You may refer to this step by step guide to change video frame rate
This guide applies to:

Change video frame rate from 1 to 60 especially among 23.97fps, 24fps, 25fps, 29.97fps, 30fps, 50i/p, 60i/p, 72p, 120p, 300p and etc;
Change frame rate of video files of all variety like change AVI frame rate, change MP4 frame rate, change frame rate of MOV, Apple ProRes, R3D, AVCHD, WMV, MKV, VOB, DV, WTV, FLV, SWF, MXF, RMVB and more;
Change video frame rate as well as keep the same video format;
Change frame rate as well as convert video to other format;